Critic's choice: stage

RSC Jacobethan Season The RSC's plucky London season of rare Elizabethan and Jacobean dramas has proved a great success and is extended until March 22. Gielgud Theatre, London W1 (0870 890 1105).

The Tempest Derek Jacobi is one of the finest Prosperos I have ever seen. Old Vic, London SE1 (020 7369 1722).

Sing-a-long-a Abba It's all as cheesy as it sounds, but the performers are genuinely engaging and this tongue-in-cheek show proves unexpectedly enjoyable. Whitehall Theatre, London SW1 (020 7369 1735).